Permutation-lock.



` PATENTED JAN. 28, 1908.

W. B. TURMAN.

l. E- E- l PBRMUTATION LOCK.

APPLICATION LYILBD AUG. 5, 1907.

WILLIAM B. TURMAN, OF WALDRON, ARKANSAS.

PERMUTATION-LOGK.

Specification of Letters Patent.

Patented Jan. 28, 1908.

Application tiled August 5l 1907. Serial No. 387.155.

To all whom it may concern:

Be it known that I, WILLIAM B. TURMAN, a citizen of the United States, residing at VValdromin the county of Scott and State of Arkansas, have invented a new and useful Permutation-Lock, of which the following is a specification.

This invention has reference to improve ments in locks, more particularly of the class known as permutation locks, and the present invention is directed specifically to a padlock, although, of course, it is not necessarily limited thereto.

In accordance with the present invention, there is provided a thin body through which extends a slot for the reception of a number of rotatable disks or permutation tumblers, all mounted for rotation upon a spindle, and

through the spindle there extends a longitudinal recess or keyway so that the spindle may be moved longitudinally with reference to the tumblers when splines or keys on the latter are brought into alinement with each other and with the key-way or recess in the spindle. The spindle is formed upon one end of a block, a portion of which is exterior to the lock body, so that it may be grasped between the fingers of the user, and at the other end of this block there is formed an extension parallel with the spindle and carrying a spring latch member arranged to engage the free end of a pivoted shackle.

The permutation tumblers are each formed of two parts or disks one of which carries the key arranged to engage in the keyway in the spindle, and the other of which is provided on its periphery with a series of numbers or other indices. The numbered disk is also provided with a circular series of holes or recesses in any one of which engages a pin on the keyed disk so that the relation of the key may be fixed in position with regard to the numbers on the other disk. In this manner, any number of combinations may be provided when two, three, or more permutation tumblers are used.

The invention will be better understood by reference to the accompanying drawings in which, Figure 1 is a side view of the lock. Fig. 2 is a central section through the same in the direction of the length of the shackle. Fig. 3 is a JEperspective view ofthe numbered member o the permutation tumbler. Fig. 4 is a perspective view of the key member of the permutation tumbler.`

Corresponding parts in the several figures are indicated throughout by similar characters of reference.

Referring to the drawings, there is shown a lock casing 1 generally rectangular in shape and comprising two end members 2, 3 joined by two other spaced members 4, 5. Between the members 4 and 5 there remains a rectangular through slot 6. Beyond the member 4, the sides 3 are formed with ears 7 between which is pivoted a shackle 8 at one end of the latter, while the other end of this shackle is arranged to pass between other ears 9 formed on the ends of the members 1 beyond the member 4. The free end of the shackle is formed into a hooked extension 10 arranged to pass into the member 2 which is made hollow, as shown, for the purpose.

The end member 3 is recessed to receive a block 11 which is provided with a flange 12 arranged to seat in the exterior side of the said end member 3 and form a closure for the recess in said member. The end member 3 is provided with a perforation 13 entering the recess 6, and the end member 2 is provided with a similar perforation 14 in line with the erforation 13. Extending through the per orations 13 and 14 is a spindle 15 formed in one piece with the block 11. This s indle is provided with a number of equiistantly disposed annular grooves 16 and a longitudinal radial recess 17 constituting a keyWay, as will hereinafter appear.

Upon the spindle 11 are mounted a number of permutation tumblers each com osed of two coacting disks 18, 19. The dis l18 is a plain disk with a perforation of such size as to fit the spindle 15, but at the same time be free to turn thereon. Each disk 18 is provided With a radially projecting tongue or key 2O Within the central perforation, and each key 20 is of such size as to move freely within the particular annular groove 16 at which it may be placed. Furthermore, each disk 18 has projecting from one face a pin 21 which, as will hereinafter appear, is definitely located with relation to the key 20. The other disk 19 has on its periphery' a number of equally spaced radial y disposedribs 22 betweenV which the periphery of the disk 19 may be provided With numerals, letters, or

any other desired indicating characters.`

Each disk 19 between its center and periphery is provided with an annular series of perforations 23 so located as to receive ain 21 of the corresponding disk 18. The dis 19 is provided with a central perforation 24 of Cir stress such size as to permit the passage of the spin- 'n with the nu :neral 1 on the 'iirst-named tumdle 11, but the disk 19 is not provided with a l bler. Nowl `the several keys or tongues 20 key as is the disk 18. Also the disk 18 may be provided with a through perforation 25 for the reception of a screw 26 which may enter any one of the perforations 23 and so hold the two disks 18 and 19 together to constitute a permutation tumbler. For this purpose, the perforations 23 may be suitably threaded. n

In order that the indicating disks 19 of the tumblers may be suitably disposed within the slot 6, one of the disks 19 is formed with a hub 27 similar in size to the disk 18 but projecting from the corresponding disk 19 Jfrom the face opposite that engaged by the corresponding disk 18.

Formed on the end oi the block 11 remote from that end carrying the spindle 15 is a lateral extension 28 at the end of which is Aformed a stem 29, which latter, together with the extension 28, is housed within the member 4 of the lock casing, this member being made hollow for the purpose. The stem 29 has Jformed on it an enlargement 3() at a point between the extension 28 and the end of the stem 29. (larried by the stem 29 is a sliding latch bol-t 31 having its free ends formed to straddle the enlargement 30 and engage behind the same, as shown at 32, while a helical spring 33 surrounding the stem 29 engages a portion of the latch bolt 31 near the head thereoic and being always under some compression urges the latch bolt in the direction away from the part 28. The spindle 15 and stem 29 lie parallel one with another, so that when the spindle 15 is unlocked and moved longitudinally, the stem 29 will participate in such movement and cause the latch bolt 31 to'travel in the same direction. Normally, the free endl of the latch bolt 31 is in the path of the hooked end 10 of the shackle 8, and when the shackle is moved so that its hooked end enters the hollow end 2 of the casing, the said hooked end will engage the free end of the latch bolt, which latter is suitably rounded for the purpose, and, moving the said latch bolt against the action of the spring 33, will pass beyond said latch bolt until the latter, under the impulse of the spring 33, sna s back over the ook and so locks the sha'c le against being moved out of the casing.

Now, let it be assumed that there are three permutation tumblers in the casing uponthe spindle 15. Let it further be assumed that the combination is such that when the irst tumbler to the left, as viewed in Fig. 1, is moved to bring the numeral 1 in the position shown in said iigure, the tongue 2O of the corresponding disr 18'will be in alinement with the recess or key-way 17. Also that the other two tumblers will be in like position when the numerals 2 and 3 on the respective tumblers are brought in line being in line with each other and with the key-way 17, the block 11 may be moved outwardly Jfrom the lock casingvuntil the latch bolt 31 is withdrawn from the path of' the hook 10. The shackle is now free to be moved about its ivot, and may be moved until the hook 10 1s withdrawn from its seat in the end member 2. The extent of movement of the block 11 may be limited by a set screw 34 passing through one of the walls ofthe member 4 and entering a recess 35 formed in the extension 28. When the block 11 is again seated in the end member 3, it is locked in such position by turning one or more, or all, of the tumblers to break the combination. When it is desired to again return the shackle to the locked position, it may be easily snapped by the bolt or latch member 31.

Suppose, now, that itis desired to change the combination. First, the original combination is set so as to permit the block 11 to be pulled outward to the extent of its movement. Then, the screw .34 is removed and the block 11 with the spindle 15 and stem "29 carrying the latch bolt 31 may be removed entirely from thelock casing, the permutation tumblers simply falling out of the slot Now, by removing the screws 26, the disks 18 may be removed from the disks 19 and their relation rotatively may be changed to any .desired extent withinthe limits of the number of index units on each disk, after which the screws 26 may be replaced and the entire structure reassembled. The lock Will then only unlock when the members corresponding to the new combination are brought into alinement.

What is claimed is 1. A permutation lock comprising a lock casing, a series of permutation tumblers movable to predetermined relative positions, a sliding block having a normal seat in the lock casing, a spindle formed on said block and directly carrying said permutation tumblers, said block having an extension parallel with the spindle, a spring actuated latch bolt carried by said block extension, and a shackle pivotally connected to the casing and having its free end movable into the path of, to'be engaged by the latch bolt.

2. In a permutation lock7 a permutation tumbler comprising a disk having erpheral indicatingv characters and a centralpperforation, an annular series of tapped perforations between the central perforation and the periphery of the disk, and another disk having a pin projecting from one Jface thereof in position to engage any one of the perforations of the annular series of the first-named -disk and also having a perforation for the ewes@ of the first-named disk, said second-named disk also havinga tongue or key projecting radially inwardly into its central perforation,

3. A permutation look comprising a suitable casing, a pivoted shackle, a block normally seated in said casing and having two parallel extensions one of which is provided with s aced annular grooves and a longitudina key-way, a spring controlled latch bolt carried by the other extension of the block, and permutation tumblers directly carried by the block extension having the keyway, said tumblers each consisting of a pair of disks one of which is provided with a key arranged to enter the key-way in the block extension and with a pin rojecting from one face, and the other of which is provided with peripheral indicating characters, and an annular series of perforations for the reception of the pin on the other disk.

4. A permutation look comprising a lock casing, a series of permutation tumblers movable to predetermined relative positions7 a shackle pivoted at one end to one end of the casing and at the other end arranged to enter said casing, a slidingblock having a normal seat in the casing and entering the same from the end to which the shackle is pivoted, a spindle formed on said block and carrying said permutation tumblers, said block also having an extension parallel with the spindle, and a spring-actuated latch-bolt carried by said block extension into the path of the free end of the shackle.

In testimony that I claim the foregoing as my own, I have hereto a'HiXed my signature in the presence of two witnesses.

WILLIAM B. TURMAN.

Witnesses:

M. S. BLACK, WM. R. COX. 

